The owner of a Lea-Francis tourer

The owner of a Lea-Francis tourer, CN 3333, is looking for information on the car. It was first owned by a naval architect, who sold the 1927 car to Barry Dove in 1946 (it was illustrated in Motor Sport in connection with one of the European touring articles Dove wrote). An advertisement for the Lea-Francis appeared in 1950. Can anyone fill in the gaps?